Improved plastijrihg-machlnk



fin."

tet? @n u WK JEFFERSON L. COBRN, OF MINERAL POINT, WISCONSIN. Lmm farmi No. 88,135, ma March 23, 1889.

DEPROVED PLASTBRINGMACHINB.

The Schedule referred-m in these Letters Patent and making part of the same.

To all persons whom these'presents may come: Be it known that I, JEFFERSON L. GOBURN, of Mineral P oint, of the county of Iowa, and State of Wisconsin, have invented a new and useful Machinel for PIaSt'eringMortar upon a Surface, whether such v surface be vertical, horizontal, or inclined; and I do hereby declare the same to be fully described in the following specification, and represented in the accompanyingdrawings, of which- Figure 1 is a top view,

Figure 2, a side elevation, and

Figure 3, a longitudinal and vertical section of the said machine.

The purpose I have had in view in making my invention has been to eiect the plastering of the walls and ceilings of a building by mechanism described, so as to accomplish a much greater amount of work in a given time, than can be eifected by the person or persons employed to operate such machine, by the use of trowels, hods, and hand-appliances, as generally employed by plasterers.

The said machine, which I term An Automatic Mason, may be thus explained:

In the drawings- ,A denotes a frame, or carriage, mounted on four wheels, a a a a, and having a hopper, B, applied to it, at or near its rear end,1so as to project above it, in manner as represented.

v.Within 4thedischarging-end of the said hopper is a Yibratory bucket, b, carried by a horizontal shaft, c, extending transversely through the sides of the hopper, and being provided with a crank, d.

This crank., by a connectingrod, e, is coupled with another crank, f, projecting from one end of a drivingshaft, g, to whose opposite end a larger, or hand-crank, h, is applied.

By-laying hold ofl and revolving ,the crank h, a reciprocating rotary movement will imparted to the bucket b, the same being. seas to cause mortar, after having been supplied to the hopper, to be discharged therefrom, at intervals and successively, upon the trowels, R, of an endless bolt, chain, or carrier, G.

The said endless carrier O, formed of. a series of curved plates, k k 16,860., hinged together, at their longer edges, is supported by and Works around two drums, or cylinders, D E.

These drums are supported by a long frame, F, which, at its lower part, is'pivoted on the drivingshaft The lower drum D is xed on aud'conceutric with the-said driving-shaft, soas to be revolved by and The other drum is arranged at the other end, or upper part of the flame F, and has its shaft-,'l, going through suchframe, the said shaft h. ving cranks, m n, at 'its opposite ends.

For the purpose of raising or lowering the said frame F, or bringing it into an inclined position, there is applied to the front part of the hopper, a windlass, G,

provided with a crank, H, a ratchet, I, and a retaining-pawl, K.

From this windlass, a chain, rope, or belt, L, extends up over a roller, or drumM, supported by amoyable standing frame, N, which, at its lower end, 1s hinged to the carriage.

The rope, chain, or band L, is fastened, at its upper end, to a bail,`O, hinged to the frame F.

After the frame F may have been varranged tol any desirable inclination, it maybe fastened to the stand-v ard-frame N, by screws o, going from onelend into the other, or with flanges, p p, of two bow-springs, P P, fixed to the frame N, or arranged as represented.

The endless carrier C is provided with a series oi' trowels, or plates, It, each of them, at one edge of it, being hinged to the carrier.

Each trowel rests ou a spring, q, interposed between it and the carrier, and projected from the trowel.

At the top of the frame F are two gauges, or horizontal plates, S S, which are ananged in manner as represented.

In front of the said gauges is a chute, or spout, T, which', at its upper end, is jointed tothe frame. It consists of a plate,-t,.with lips, no, turned up on it, at its opposite edges, and at right angles to it.

Within the said spout T is a movable tongue, or plate, U, which extends from one lip, fv, to the other, and has journals, u u, arranged in bearings in the said li s o c.

pThe spout I rests on a bent lever, w, pivoted to the frame F, and having a rod, zo, extending from down alongside of the hopper.

Another such rod, z, also leads from a projection, y,

extended from the' upper part of the tongue, or plate U, such rod, z, also going down by the side of the hopper.

'By means of the rod n: and lever w, an attendant ou the machine can either'raise or depress the chute, or spout, as circumstances may require. So, by means of the rod z, he may move the plate- U so as to gauge the thickness of the mortar which at any time may be flowing on the chute, or spout.

Two rails, a' a, exteud back om the'upper partof the frame F, and are supported, at their rear ends, by `curved uprights, b b', which extend through the longijtudinal bars of such frame, and may be iixed therein by set-screws, or other proper devices, the whole being so'as to enable the rails to be adjusted to a horizontal position, whatever may be the inclination of the frame F.

The said two rails support and guide the smoothing-plate, or smoother V, which is moved backward and forward on them by connecting-rods, c c', pivoted to the smoother, and to the wrists of two cranks, d d', iixed on the shaft of the upper guide-drum, or roller of the endlesscarrier, or elevator C.

The operation of the machine may be thus described:

Snpposing the hopper to have been supplied with mortar, and ythe frame F to be raised to the requisite inclinationto cause the machine, while at work, to lay the mortar on the ceiling of an apartment, the machine resting on the door of such apartment, an attendant is to lay hold of and revolve the crank of the driving.- shaft, so as to put the endless carrier, or elevator in movement. Thisrwill cause the trowels to be successively brought underneath the hopper, and'while there toreceive therefrom a charge of mortar.' Each trowel, after having been so charged, will be raised up to the lathingof the -ceiling of the room, and will lay the mortar against such. On arriving at the ceiling, or lathed part thereof, the outer edge of the trowel will strike face .up to the lath, but almost immediately afterward, the trowel-will be depressed by the gauges at the top oflthe frame F, and will gradually assume a horizontalposition at the proper distance from the laths, to lay the mortar thereon to the desirable thickness. After this, the tro'wel continuing to move on,

will pass underneath the chute and against it, so as to discharge into the chute all the waste, or surplus mortar, which will pas's between the chute and its gauge, or tongue. v

As such operation goes on, the attendant is to push the machine along on the door, so as to cause a strip of mortar to be laid along the ceiling.

Should the ceiling be uneven, the springs on lwhich the frame F is supported will give Way, and allow the frame and its trowels to accommodate themselves to the unevenness.

After each trowel may have done its duty, as set.

forth, tlie smoother, by being moved back and' forth, will smooth the mortar deposited, and reduce it to a proper thickness.

The surplus mortar caught by the chute may be used in finishing the plastering up to the edges of the apartment, which is to be accomplished by moving the machine along, and bringing the chute up to the ceil-V ing, and moving x and z.

With a machine of the kind, properly constructed, I find that one attendant will average about sixty square yards of plastering -per hour, in a room of eight or ten feet in height.

I' claim the combination of the carriage, or frame A, the hopper B,'the vibratory bucket, or disoharger b, the frame F, the endless carrier, or elevator'G, and its series of trowels, the whole being arranged and provided with mechanism to enable them to operate, substantially as and for the purpose described.

And, in combination therewith, I claim the chute and its gauge-tongue, provided with mechanism for operating them, substantially as described,

I also claim the combination of the smoother, the endless elevator C, and its series of trowels, the frame F; the hopper, the vibratory discharger b, and the car-v riage A, the whole being to operate as se't forth.

I also claim the combination of the gauges S S with the frame F, the endless carrier G, and its series of trowels,

the ,tongue more or less by the rods I also claim the combination of the springs P P with` the frames F and N, the endless carrier C, its series of trowels, the carriage A, the hopper B, and the dis- ,charger b thereof, such springs being for the purpose specified. y

JEFFERSON L. OOBURN. Witnesses:

W. W. LIKENS,

EDWD BLIss. 

